Stuart Turner Techflo qt Guide

Installation, Operation & Maintenance

Instructions

Please leave this instruction booklet with the owner as

it contains important guarantee, maintenance and safety

information

Read this manual carefully before commencing installation.

This manual covers the following products:

U2.3 bar Single

Pt. No. 49082

U2.3 bar Twin

Pt. No. 49080

U3.3 bar Single

Pt. No. 49083

U3.3 bar Twin

Pt. No. 49081

FOR POSITIVE OR NEGATIVE HEAD APPLICATIONS

CE compliant product

- 2 -

PRODUCT DESCRIPTION

Electric motor driven single or twin ended centrifugal pump, complete with an automatic

control system, consisting of flow switches and electronic controls.

APPLICATION

Techflo qt pumps are suitable for positive or negative head installation conditions. The

pumps are designed for whole house pressure boosting applications in vented stored water

systems. Inlet pressures to the pump and ambient temperatures must not exceed the

values given in the technical specifications.

This pump set must not be used for any other

application without the written consent of Stuart

Turner Limited and in particular, MUST NOT be

connected directly to the mains water supply.

This appliance can be used by children aged from

8 years and above and persons with reduced

physical, sensory or mental capabilities or lack

of experience and knowledge if they have been

given supervision or instruction concerning use of

the appliance in a safe way and understand the

hazards involved. Children shall not play with the

appliance. Cleaning and user maintenance shall not

be made by children without supervision.

Children should be supervised to ensure that they do

not play with the appliance.

Please read installation details carefully as they are intended to ensure this product

provides long, trouble free service. Failure to install the unit in accordance with the

installation instructions will lead to invalidation of the warranty.

STORAGE

If this product is not to be installed immediately on receipt, ensure that it is stored in a dry,

frost and vibration free location in its original packaging.

CONTENTS Page

Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Important Facts - read before commencing installation . . . . . . . . . . . . . . . . . . . . 5

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Pump Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Technical Speciﬁcation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Trouble Shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

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Cont ...

CHECKLIST

Item Description Qty Item Description Qty

Pump 1 Outlet hose only 2 (1)

Inlet hose with isolating valve 2 (1)

Your product may vary slightly from the picture above.

The quantities shown above are for twin pumps, (single pumps are shown in brackets).

Fig. 1 (Twin pump shown)

22 mm isolation valve

(non restrictive) (not

supplied).

To allow easy service

of pump

22 mm inlet pipework

22 mm outlet pipework

IMPORTANT: With the

pump removed from its

packaging check for any

damage prior to installation.

If any damage is found

contact Stuart Turner Ltd

within 24 hours of receipt.

Strainer

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Cont ...

PRE-INSTALLATION ASSEMBLY

The pump as supplied requires some installer assembly.

1. Remove the two red transportation caps by unscrewing; these can be discarded

(Fig. 2).

2. Check to ensure the ‘O’-rings are in position inside the large plastic nut on the top of

the pump.

3. Lift the ‘H’ frame assembly and gently push the threaded area at the bottom onto the

plastic nut.

4. Rotate the plastic nut anti-clockwise (viewed from the top). Ensure the plastic nuts are

tightened evenly on twin pumps.

5. Fully tighten by hand.

6. Fit the sealing washer and hand tighten the pressure vessel (Fig. 3). Care must be

taken when fitting the pressure vessel not to cross-thread on assembly.

Do not overtighten the pressure vessel.

Fig. 2

Pressure

vessel

Sealing

Washer

Fig. 3

‘H’ assembly

Transportation

cap

‘O’-ring

- 5 -

Cont ...

1 READ BEFORE COMMENCING PUMP INSTALLATION

A. Water storage capacity.

1.11 The hot and cold water storage capacity must be sufficient to meet the flow rates

required by the pumped equipment and any other water using fittings and

appliances, which may be operated simultaneously.

1.12 Ensure the pump is primed as described in the priming section before starting,

damage to the shaft seal will result otherwise. See Section 5 - Commissioning.

B. Water temperature

The water entering the pump must be controlled as follows:

1.13 The maximum allowable water temperature is 65 oC.

1.14 The minimum allowable water temperature is 4 oC.

1.15 DO NOT fit a pump if the hot water is heated via a method whereby the water

temperature cannot be controlled, such as solar or solid fuel you must consult the

PumpAssist team on 0844 98 000 97.

C. Pipework - General

1.16 Secure pipework: Ensure pipework to and from pump is independently

supported & clipped to prevent forces being transferred to inlet and outlet

branches of pump.

1.17 Flux: Solder joints must be completed and flux residues removed prior to pump

installation (flux damage will void any warranty).

1.18 Pipework design: Care should be taken in the design of pipework runs to

minimize the risk of air locks e.g. use drawn bends rather than 90obends.

1.19 DO NOT introduce solder flux to flexible hoses, pumps or pump parts

manufactured from plastic.

1.20 DO NOT allow contact with oil or cellulose based paints, paint thinners or

strippers, acid based descalents or aggressive cleaning agents.

1.21 DO NOT install a non-return valve, or devices which contain non-return

valves, in the suction (inlet) pipework to the pump. The pump must be free

to vent to the supply tank at all times.

1.22 DO NOT bend the flexible hoses beyond 30o. They must be installed as

straight as possible.

1.23 DO NOT connect this pump to the mains supply or fit in an unvented

system.

D. Plumbing & Electrical Installation Regulations

1.24 The plumbing installation must comply with “The Water Supply (Water Fittings)

Regulations 1999” and “BS 6700” building regulations.

1.25 The plumbing installation must be installed by a qualified person.

1.26 The electrical installation must be carried out in accordance with the current

national electrical regulations.

1.27 The electrical installation must be installed by a qualified person.

E. Pressure vessel

1.27 Pressure vessel is charged at the factory see Section 6 - Maintenance for

details.

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Cont ...

2 LOCATION - GENERAL

2.11 Access: For emergencies and maintenance the pump must be

easily accessible.

2.12 Protection: The pump must be located in a dry position, frost free and

protected from freezing, particularly when installed in a loft (not

recommended).

2.13 Ventilation: Ensure an adequate air flow to cool the pump. Separate

the pump from other appliances that generate heat. An 80 mm (3 “) air

gap must be maintained around the pump.

2.14 Safety: The motor casing can become very hot under normal

operating conditions. Care must be taken to ensure it cannot be

touched during operation.

2.15 Water retention: If possible site the pump in a location where in the

unlikely event of a water leak, any spillage is contained or routed to

avoid electrics or areas sensitive to water damage.

2.16 Static inlet pressure: Before deciding where to position the unit, check to

ensure the static inlet head of water above the pump (Figs. 4 & 5), does not

exceed the maximum permitted limits.

2.17 Pump position: The pump must be positioned on its anti-vibration mounting

feet and as close to the water source as possible.

2.18 Ambient temperature: The pump must be sited in a location where the maximum

ambient temperature does not exceed 40 oC.

2.19 Pipework: For optimum performance pipework MUST be 22 mm. Pipework

should only reduce to 15 mm when entering terminal fitting.

2.20 Static outlet pressure: The static outlet head must also be within the maximum

requirement, see Figs. 4 & 5.

2.21 Noise: The anti-vibration mounting feet and flexible hoses which are supplied

as standard, as a precaution to reduce noise transmission, however care must

be taken when mounting the pump that any noise is not amplified through loose

panels or pipework. Do not screw down the pump.

2.22 Flexible hoses: Use only Stuart Turner supplied hoses.

2.23 Isolating valves: Separate isolating valves (non restrictive) must be fitted to

allow easy pump service.

2.24 Pump location: The pump location must be at floor level next to the hot water

cylinder or a level that is below the secondary tapping that feeds the pump. This

will ensure the pump has access to an air free water supply which is important for

trouble free operation (Figs. 4 & 5).

Pump location is also dependent on limitations of the static inlet and outlet heads

of the installation. For guidance on limitations and recommended location,

consult the following relevant section for water installation.

Either end of the pump is suitable for hot or cold water.

- 7 -

Cont ...

2 LOCATION - SINGLE PUMP

2.25 The cold water supply: Must be a DEDICATED AIR FREE supply via a tank

connector, and must be positioned at a slightly lower level (25 mm minimum) than

the feed pipe to the hot water cylinder.

Do not connect to the mains.

Positive Duty Single Pump System

Fig. 4

Static outlet Pressure

Max. 6 m

Max. inlet head 6m

Min. inlet head 0.5 m

- 8 -

Cont ...

2 LOCATION - TWIN PUMP

2.26 Hot water cylinder or storage tank: When a hot water cylinder or storage tank

is used, ensure the pipework size from the cold water storage to the hot water

storage is of adequate size and a minimum of 22 mm.

2.27 Hot water supply: The pump must be supplied with a dedicated feed direct

from the hot water cylinder or storage tank, ensuring an air free connection to the

cylinder, which can be made by one of the methods shown in Fig. 6. We

recommend the use of the Stuart flange TE Part No: 27800 or the Stuart

flange SE Part No: 27900.

2.28 Expansion pipe: When the method of connection is to be made via the

expansion pipe, the cold water storage cistern should be at least 1 metre above

the top of the hot water cylinder.

2.29 Location: The pump must, for optimum performance, be sited as close as

possible to and never more than 4 metres from the HOT WATER cylinder. The

pump should always be sited BELOW the HOT WATER take-off from the cylinder.

Positive Duty Twin Pump System

Fig. 5

Fig. 6

G 1 Stuart flange

top entry (TE) (Part

No. 27800) with

22 mm pipework to

pump.

Factory installed G ¾

secondary tapping with

22 mm pipework to pump.

Side mounted Stuart

flange side entry (SE) (Part

No 27900) with 22 mm

pipework to pump.

Static outlet Pressure

Max. 6 m

Max. inlet head 6m

Min. inlet head 0.5 m

- 9 -

Cont ...

3 PUMP CONNECTIONS

Do not use stainless steel, chrome or nickel plated pipe with the

flexible hose push-in plumbing connections.

Do not introduce solder flux into the joint or surrounding area as

connectors will be attacked and may fail and void warranty.

All solder joints should be completed and flux residues removed

before final connection to push-in connections, on the flexible hose.

Do not allow contact with oil or cellulose based paints, paint

thinners or strippers, acid based descalents or aggressive cleaning

agents.

Never operate pump with inlet and/or outlet isolating valves in the

closed position. Damage will occur!

3.11 Hose to pump: Inlet - use hoses supplied with isolating valves built-in for the

inlets, push home onto the pump connections to a depth of 33 mm ensuring the

strainers are in place.

Outlet - use hoses suppled with no isolating valves and follow same process.

3.12 Hose to pipework:

1. These plastic push-in connectors, must only be connected with the following:

a) 22 mm diameter copper pipe to BS EN 1057 - R250 (half hard) - Table 3.

b) 22 mm plastic pipe to BS 7291 part 1 and part 2 (Table 1), or part 3

(Table 1) plus internal support sleeve*.

* The internal bore of the plastic pipe must be supported against collapse

with the pipe manufacturers recommended support sleeve (pipe insert).

c) Appropriate plumbing fittings that are compatible and will provide a water

tight connection.

Ensure the pipe is free from all score marks and deformities in the area of the

insertion depth (Fig. 7) and cut the pipe square removing all burrs and sharp

edges to prevent damage to the sealing ‘O’-ring.

2. Prior to inserting pipe into fitting mark the insertion depth on the wall of the

pipe with a soft pencil at a distance of 33 mm from the end to be inserted.

Fig. 7

Pencil

mark

Insert depth

33 mm

22 mm Pipe

- 10 -

Cont ...

3. Check in the mouth of the fitting that ‘O’-ring, nylon washer and collet are in

position.

4. Push pipe firmly into fitting, until pencil mark is level with the top of the collet

and the pipe stop resistance is felt. Pull on pipe to check it is secure and

correctly fitted.

5. To break the joint, push pipe firmly into fitting, hold collet down and gently

remove pipe. If the system has been filled with water care should be taken

to isolate pump and towels used to absorb spilled water.

3.13 Typical Low Level Installation: In certain installations it may be necessary to

install a 90° bend on the inlet or outlet connections of the pump before the

flexible hose to accommodate a low level installation. For this purpose use a

22 mm stem elbow (not supplied).

If you have any concern either about using push-in fittings or should the joint

leak on final test isolate the water supplies and contact PumpAssist on

0844 98 000 97.

Fig. 8

Body Collet

Washer

‘O’-Ring

Pipe Stop

Hose Isolating Valve

Fig. 9

Inlet

Outlet 22 mm stem elbow

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